Intermec NORAND 6642 - Manual (Page 38)

SECTION 3 Software
3-7 PEN*KEY
R
6642 Pen Computer User’s Guide
The Autocheck button changes the brightness of the backlight
when AC power is connected. If this box is checked, the backĆ
light brightness cannot be adjusted.
"
NOTE: The backlight brightness can be adjusted temporarily by sliding the
arrow to maximum, but with the “Auto” box checked, the brightness is
set according to remaining battery power.